> but they'll remain a relevant game engine
For a little while. The problem is that Unity is a public company, merged with a malware company, and (currently) headed by somebody with no understanding of their own customers. But nobody looking to make games right now is going to start using Unity. Many indie developers are going to transition off, and the major players who still use it are likely going to find that Unity is going to start squeezing them to keep any semblance of profitability. Maybe big games like Genshin/Cities Skylines/Pokemon Go stick with it, but Unity doesn't survive that transition.